/Engine/Source/Runtime/Engine/Public/Raster.h
void DrawTriangle ( const [InterpolantType](API\Runtime\Engine\FTriangleRasterizer\InterpolantType) & I0, const [InterpolantType](API\Runtime\Engine\FTriangleRasterizer\InterpolantType) & I1, const [InterpolantType](API\Runtime\Engine\FTriangleRasterizer\InterpolantType) & I2, const FVector2D & P0, const FVector2D & P1, const FVector2D & P2, bool BackFacing )